Additional fun fact, Kansas has in the past attempted to annex Kansas City, Missouri.
The metro area being split between MO and KS has also caused a race to the bottom for certain kinds of regulations and taxes because for many businesses the cost of moving between the two states was essentially moving from one side of State Line Rd to the other.
Such a strange metro area.
The cities also indexed their streets off of the same river, but at different places along the curving bank. As a result, traveling south in KCMO increments the street numbers, but in KCK, the numbers increment when you travel west.
For more hilarity, the cities to the south of KCK adopted the KCMO street number designations, so KCK is the odd city out.